Question

tom's mother什么at home by himself

1.Is Jim at home by himself
No.There's another boy_____with him
A.playing B.play C.plays D.to getting
为什么不选C?
2.The sheep ____to the tree was found dead .How poor it is.
A.tied B.tying C.was tied D.was tying
3.Helen____ her keys in the office so she had to wait until her husband _____
A.has left;comes B.left;had come C.had left；came D.had left;would come
4.Tom ____ out
Oh,has he?What time ___he ____out?
A.is;did;go B.went;is;going C.has gone;did;go D.is going;does;go
答案和为什么

Answer 1

1.选A 如果你选Plays,那么这个句子就有两个动词了,不行（一个是is,一个是plays）
2.A tied to the tree是过去分词做定语,那头绑在树上的绵羊被发现死了,多可怜啊
3.C had to wait用的是过去时,而Helen 丢钥匙是在她等之前,所以用过去完成时,后面她丈夫出现,时态和had应该一致
4.C 从回答可以看出问句应该用现在完成时
他出去的这个动作发生在过去,所以用一般过去式
“Tom出去了” “哦?是吗?他什么时候出去的?”